Reenforced-metal tube



H. o. RA STETTER REENFORGED METAL TUBE July 7, 1925.

4 Sheets-Sheet 1 Filed July 19, 1921 Wye W155 Qttm mm d July 7, 1925.

H. O. RASTETTER REENFORCED METAL TUBE Filed July 19, 1921 4 Sheets-Shea July 7, 1925.

H. O. RASTETTER REENFORCED METAL TUBE Filed July 19, 1921 4 Shets-Sheet 5 harr July 7, 1925.

H. o. RASTETTER REENFORCED METAL TUBE 4 Sheets-Sheet 4 Filed July 19', 1921 lfllllllll'l'llllfllldIIVIIIIIIIII'IIII! "Ill Ill

Patented July 7, 1925.

UNITED STATES PATIENT OFFICE. 3

HARRY o. RASTETTER, or oANToN, OHIO, nssreNoiiTo THE uNIoN METAL mam FACTURING COMPANY, or CANTON, 01110, A CORPORATION or 01110.

nEENroRonn-mETAL TUBE.

To all whom it. may concern: 7

Be it known that I, HARRY O. Rns'rn'm'nn, a citizen of the United States, residin at Canton, in the county, of Stark and fate of Ohio, have invented a new and useful Reenforced-Metal Tube, of which the fol lowing is a specification.

This invention relates to reenforced metal tubes, and has for its objects to provide a metal tube arranged to support a load or to receive strains or stresses, and provided" with interior reenforcing means arranged to prevent buckhng or bending of the tube,

due to the weight or strain placed thereon,

and to prevent the tube from being bent or-buckled by an impact or blow against any side of the tube.

The above and other objects may be attained by providing a sheet metal tube of any desired cross sectional shape and reeniorced by a. plurality of radial vanes or webs preferably surrounding a central rod or tube and engaging the inner wall of the tube at spaced intervals.

Although :the invention is adaptable to any form of metal tube, it is designed especially for use upon hollow sheetmetal columns such as are used for building purposes and for lamp standards for street-and park lighting and the like.

The invention thus set forth in general terms is illustrated in the accompanying drawings, in which- Figure 1 is a vertical, sectional View through the lower port-ion of a lamp standard provided witlr a ;hollow sheet metal column embodying the invention;

Fig. 2, a perspective view of a portion of the lamp standard with the tubular shell removed, showing the reenforcing vanes in positionupon the base of the column;

Fig. 10, a similar View showing a stillfurther modification of the reenforcing vanes;

Fig. 11, a cross sectional view through a round tube showing a different construction otreenforcing vanes;

Fig. 12, a cross sectional View through a hexagonal tube showing an arrangement of reenforcing vanes somewhat similar to that shown in Fig. 8; r

Fig. 13,- a cross sectional view through a fluted column showing a further modification of the reenforcing vanes;

Fig. 14, a cross sectional view through a triangular tube or column, showing a different form of reenforcing vanes;

Fig. 15, a cross sectional view of a fluted tube or column showing the reenforcing vanes extending into the flutes of the tubular member, the central rod being dispensed with;

' Fig. 16, a perspective view of a. further modification of the invention, showing the :same applied to a tapered column, parts being broken away for the purpose of illustratio-n Fig. 17 a vertical, sectional View through the same upon anenlarged scale taken on the line 1 717, Fig. 18;

Fig. 18, a transverse, sectional view taken upon the line 18-18, Fig. 17; and

Fig. 19, a detail perspective view of one of the reenforcing rings shown in Figs. 16 to 18 inclusive.

Similar numerals of reference indicate corresponding parts throughout the several figures of the drawings.

Referring first to Figs. 1 to 4, inclusive, in which the invention is shown applied to a shaft or column, designed to carry an illuminating lamp, the base of the column is shown at Land is preferably cast. This base, as shown, ishollow and maybe of any cated the lower end of the tubular sheet extending from theadjacent portion 8 to metal column 3. This construction is common in lamp standards of this character,- as shown in Patent No. 1,086,346, in whi h the tubular sheet metal column is mounte 'upon the base in this manner.

Where a hollow metal column of this character is used in a lamp standard laced along a street or roadway, ,or in va similar location where the column is likely to be struck by passing vehicles, it has been found that some reenforcement is necessary for the hollow metal column, as in cases where vehicles have collided with a column of this description, the column has been collapsed, throwing the lower end of the same out of engagement with the annular shoulder upon the base, making it necessary to tear down the entire structure and replace or repair the hollow metal column.

The purpose of the present invention is to provide a 'reenforcing means for a hollow,

sheet metal column or tube, which will prevent collapsing of the column or tube in the manner above described, and which vwill eliminate the possibility of a hollow metal column used in a lamp standard from being damaged to such extent as to require the.

one of the flutes 7 of the column. A disk 9 is located at each end of the rod 4 and clamps against the upper and lower ends of the vanes 5 and 6 by means of the nuts 10.

The tie bolts 11 are connected beneath the base in any suitable manner, such as by embedding the same in the cement 12 as shown in Fig. 1, and extend through suitable apertures in the lower disk 9 and between adjacent vanes as best shown in Fig. 4, the upper threaded ends thereof extending through suitable apertures in the upper disk 9, nuts 12 being provided upon the upper ends of said tie bolts for clamping the upper disk tightly" upon the reenforcing vanes and drawing the vanes into tight engagement with the lower disk 9 which is thus clamped against the annular shoulder 2 of the base.

Tie rods 13 may be connected to the upper portion of the base as shown in Figs. 1 and 3 and extend upwardly between adjacent vanes and through suitable apertures in the upper disk 9, for the purpose of attaching the capital of the column in the same manner as shown in the patent above referred to.

In Figs. 5 to 8 inclusive the reenforcing means comprises a central rod or tube 14 to whlch the vanes 15 are connected,said vanes shown in a fluted column 18, one vane ex' tending into each flute -19'of the column,

while in Fig. 7, a round column-or tube is shown, the outer vertical edges of the vanes engaging the inner wall of said tube or column.

In Fig. 9 is shown a cross sectional view of a fluted column or tube 21 in which one vane 22 is provided with a vertical, tubular portion 23 extending around thecentral rod 24, the remaining vanes 25 engaging said tubular portionat their inner edges, said vanes, the same as shown in Fig. 4, being of I sufficient thickness to be held in engagement with the inner edge portions of the adjacent vanes when the device is assembled, the,

outer edge portions of all of the vanes extending into the flutes 26 of the tube or Y column.

In Fig. 10 the fluted column or tube 27 is provided with the concentric shaft or tube 28, the vanes 29 being formed in pairs and each provided with a vertical connecting strip 30. which may be attached to the central tube 28 in any desired manner, the outer flutes 32 of the column or tube 27.

edges-31 of said vanesextending into the The round tube or column 33 shown in engagin the inner wall of the tube at their outer e ges, the inner edges thereof being located between the ribs 36. of the rod 34.

In Fig. 12 is shown a hexagonal column 42 having a central rod 43, the vanes 44 being formed in pairs, each pair having a connecting strip 45 which is attached to the rod 43 in any suitable manner, the outer edges of the vanes extending into the corners 46 of the column 42.

A fluted tube or column 37 is shown in Fig. 13, a concentric tube'38 being located therein. Each of the vanes 39 is T-shaped in cross section, the head portions 40 thereof engaging the inner tube 38 and being of suflicient width to engage the head portions of adjacent vanes upon each side, the outer edge portions of the vanes extending into the flutes 41, of the outer tube or column 37.

In Fig. 14, the invention is shown adaptstrip 51 which is attached to the rod 48 as by the rivets 52 the outer edge of the long vane engaging the ad'acent corner 53 of the column, while each s ort vane engages the central portion of one of the side walls 54 thereof.

A hexagonal tube or column is shown in Fig. 15 and designated by the numeral 55, the vanes 56 and 57 being located obliquely through the tube and engaging the inner corners thereof. Any suitable construction of the vanes may be provided, such as the form illustrated, in which the vane 56 extends entirely across the tube, while each vane 57 extends from the adjacent corner of the tube to the vane 56, being connected thereto.

It may be found desirable in some instances to locate a crimped wire 58 at intervals around the vanes to hold the outer edges of the same in proper spaced relation,

and to hold the entire reinforcing structure assembled until the same is placed withln the tube or column.

Referring to Figs. 16 to 19, inclusive, in which a further modification of the invention is shown applied to a tapered column, such as might be used for supporting a lamp or the like, the base, which is preferably cast, is shown at 60, and may be provided with the annular shoulder 61, over which the lower end of the tapered, fluted, metal column 62 is placed, said base being provided with the tapered, annular flange 63.

The reenforcing vanes in this form of the invention are preferably in the shape of U- bars 63, the flanges or vanes 64: thereof being radially. disposed and extend into the flutes 65 of the metal column 62.

Annular reenforcing members are located at intervals within the U- bars, these annular members being slightly tapered to conform to the taper of the column. These reenforcing members may be in the form of rings such as shown at 66 having a reenforcing spider 67 therein, the U-bars being connected to said rings as by the rivets 68.

The lower reenforcing member may, if

desired, be elongated in the form of thetapered tube 66 extending from the base upwardly a suitable distance to reenforce the portion of the column which may be subjected to blows.

The lower end of the reenforcing tube 66 may be located around the tapered flange 63 of the base to further reenforce the lower end of the structure.

The upper reenforcing ring 66 is preferably extended around the downwardly disposed, tapered flange 69 of the top plate 70,

said flange also engaging the lnner surfaces of the U-bars at their upper ends.

The top plate 70 is clamped firmly upon the upper ends of the U-bars and the column 62 by means of tie bolts 71 which pass downwardly throu h the annular reenforcing members and through lugs 72 provided in the base 60, nuts 73 and 74 being provided. at the lower and upper ends of said tie bars for drawing the parts together, thus clamping the column and the U-bars firmly upon the base. i

From the above, it will be seen that .numerous modifications of the invention may be provided, in all of which a central rod or tube issurrounded by radial vanes engaging the inner wall of the hollow column or tube, means being provided for preventing movement of the inner edge portions of the vanes, an'd flutes or the like being provided in the tube or column in most of the modifications, into which the outer edge portions of the vanes extend to prevent relative movement of the outer edges of the vanes with reference to the tube or column.

It will be evident that with the provision of a reenforcment such as above described, it will be practically. impossible to collapse a sheet metal column or tube. in the manner above referred to, as the reenforcing vanes will strengthen the hollow column and pro vent the same from being seriously dam aged.

It is of course understc ad that hollow fluted sheet metal columns of the type shown in the drawings are at present-placed upon a mandrel, rollers being passed over the column for forming the flutes therein but it will be obvious that the mandrel will be dispensed with, the reenforcing vanes being inserted in the cylindrical column, such as shown in Fig. 7, the column being supported in the forming machine upon the reenforcing vanes, the flutes being formed over the edges of the vanes, as indicated by dotted lines in Fig. 7, the finished .column formed in this manner being shown in Fig. 5.

I claim 1. An article of manufacture, including a fluted, sheet metal, tubular member, and a plurality of radial reenforcing vanes located therein and extending into said flutes.

2. An article of manufacture, including a fluted, sheet metal, tubular member, a central member extending therethrough and a plurality of radial reenforcing vanes engaging said central member and extending into said flutes.

3. An article of manufacture, including a fluted, sheet metal, tubular member, a central member extending therethrough and a plurality, of radial vanes within the tubular member and extending into the flutes there of, one of said vanes having a curved portion extending around the central member.

4. An article of manufacture, including a base, a hollow, sheetmetal column mounte'd thereon, a plurality of radial vanes engaging the inner wall of the column, and

means for connecting said radial vanes to the base.

5. An article of manufacture, including a base having a shoulder at its upper end, a hollow, metal column' mounted upon said shoulder, a plurality of radial vanes engaging the inner wall ofethe column, a plate engaging each end of said vanes and rods extending'upwardly through the base and through said plates.

hollow, metal column mounted upon said.

shoulder, a plurality of radial vanes engaging the inner Wall of the column, a plate engaging each end of said vanes and rods extending upwardly through the base and through said plates, and means upon the upper. ends of the rods for clamping the plates upon the ends of the vanes and clamp-- ing the lower plate upon the upper end of the base. i V

8 An-article of manufacture, including a base 'havinga shoulder at its upper end, a fluted, hollow, metal column mounted upon .said shoulder, a plurality of radial vanes Within the dolumn and extending into the flutes thereof, a plate at each end of said vanes, and tie rods extending upwardly through the base. andthrough said plates and provided with means for clamping the I plates upon the vanes and holding the lower plate in .engagement with the upper end of the base.

9. An article pf manufacture, including a base, a fluted, hollow, metal column mounted upon said base, a plurality of radial vanes extended into saidflutes, annular reenforcing members connected to the inner edges of said vanes at spaced intervals, :1. plate mounted upon the upper end of the column and engaging the upper ends of the vanes and tie rods located between thebase and said plate for drawing the column and vanes into engagement withthe base.

10. An article of manufacture, including a tubular member having longitudinal corners, and a plurality of radial reenforci'ng vanes located therein and extending into said corners.

In testimony that I claim the above, I have hereunto subscribed my name.

HARRY o.- RASTETTER, 

